Finding the Third Proportional to 419,415,392 and 629,123,168

Step by Step Solution

1. Step 1: Write the proportion equation
   419,415,392 : 629,123,168 = 629,123,168 : x
2. Step 2: Convert to fraction form
   419,415,392/629,123,168 = 629,123,168/x
3. Step 3: Cross multiply
   419,415,392x = 629,123,168 × 629,123,168
4. Step 4: Simplify right side
   419,415,392x = 395,795,960,514,356,224
5. Step 5: Solve for x
   x = 395,795,960,514,356,224/419,415,392
6. Step 6: Final answer
   x = 943,684,872.00